package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.TimeUnit;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合，返错误信息
            return Result.fail("手机号格式错误!");
        }
        //3.符合生成验证码
        String code = RandomUtil.randomNumbers(6);
//        //4.保存验证码到session
//        session.setAttribute("code",code);

        //4.保存验证码到redis
        stringRedisTemplate.opsForValue().set("login:code:"+phone,code,2, TimeUnit.MINUTES);//并设置一个过期时间

        //5.发送验证码
        log.debug("发送短信验证码成功，验证码：{}",code);
        //6.返回OK
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号
        String phone=loginForm.getPhone();
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合，返错误信息
            return Result.fail("手机号格式错误!");
        }
        //2.从redis获取校验验证码
        String cacheCode = stringRedisTemplate.opsForValue().get(RedisConstants.LOGIN_CODE_KEY +phone);
        String code=loginForm.getCode();
        if(cacheCode==null||!cacheCode.equals(code)){
            //3.不一致报错
            return Result.fail("验证码错误!");
        }
        //4.一致根据手机号查询用户
        User user = query().eq("phone", phone).one();
        //5.判断用户是否存在
        if(user==null){
            //6.不存在，创建用户并保存
           user= createUserWithPhone(phone);

        }
        //7.保存用户信息到redis中
        //7.1随机生成token，作为登录令牌
//        String token = UUID.randomUUID().toString(true);
        String token = String.valueOf(UUID.randomUUID());
        System.out.println("token = " + token);
        //7.2将User对象转为Hash存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        System.out.println("userDTO = " + userDTO);
        //7.3存储
        Map<String, Object> stringObjectMap = BeanUtil.beanToMap(
                userDTO,
                new HashMap<>(),
                CopyOptions.create().
                        setIgnoreNullValue(true).
                        setFieldValueEditor((fieldName, fieldValue)-> fieldValue.toString()
        ));//将对象转化为map
        stringRedisTemplate.opsForHash().putAll(RedisConstants.LOGIN_USER_KEY+token,stringObjectMap);
        //设置有效期。
        stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY+token,30, TimeUnit.MINUTES);
        //返回token
        return Result.ok(token);
    }

    private User createUserWithPhone(String phone) {
        //1.创建用户
        User user = new User();
        user.setPhone(phone);
        user.setNickName("用户"+RandomUtil.randomString(10));
        //2.保存用户
        save(user);
        return user;
    }
}
